Heat transfer performance of a fractal silicon microchannel heat sink subjected to pulsation flow

Xu, Shaowen; Wang, Weijie; Fang, Kuang; Wong, Chun-Nam

doi:10.1016/j.ijheatmasstransfer.2014.10.002

Cited by 30 publications

(7 citation statements)

References 23 publications

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“…The axial heat transfer, surface roughness, viscous heating are also negligible. Wavy channel [9][10][11][12], branched channel [13][14][15], ribs, fins or rough elements [16][17][18][19] (such as triangular, rectangular, dimple elements and so on) have also been investigated, the rough elements method can strengthen the convection heat transfer without large pressure penalty and is a possible low-cost solution.…”

Section: Introductionmentioning

confidence: 99%

Parametric numerical study of the flow and heat transfer in microchannel with dimples

Gong

et al. 2016

International Communications in Heat and Mass Transfer

107

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The characteristics of flow and heat transfer in microchannel with dimples were numerically investigated. The geometric parameters of dimpled channel, including aspect ratio, dimple depth and dimple spacing, were independently studied under constant Reynolds number 500. A constant heat flux 1W/mm 2 was adopted in the central area at the bottom of the microchannel heat sink to simulate a high power device. In comparison to straight channels, dimpled surface reduced the local flow resistance and also improved thermal performance of micro-channel heat sink. Compared to flat channel case, the optimal dimpled case have 3.2K decrease of temperature, 15% gain of Nusselt number and 2% reduce of pressure drop.

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Section: Introductionmentioning

confidence: 99%

Parametric numerical study of the flow and heat transfer in microchannel with dimples

Gong

et al. 2016

International Communications in Heat and Mass Transfer

107

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“…A conclusion is made that a fractal heat sink has lower pressure drop, more uniform temperature field distribution, and higher coefficient of performance than that of the traditional helical channel net heat sink. In the latest review article [16] on optimization design of heat sinks the fractal geometry is mentioned only in one cited article [17]. A simple heat sink is simulated consisting of a fractal split microchannel up to second iteration formation only.…”

Section: Introductionmentioning

confidence: 99%

Fractal Geometry as an Effective Heat Sink

Ramšak¹

2022

sv-jme

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"How long is the coast of Britain?" was the question stated by Mandelbrot. Using smaller and smaller rulers the coast length limits to infinity. If this logic is applied to the fractal heat sink geometry, infinite cooling capacity should be obtained using fractals with mathematically infinite surface area. The aim of this article is to check this idea using Richardson extrapolation of numerical simulation results varying the fractal element length from one to zero. As expected, the extrapolated heat flux has a noninfinite limit. The presented fractal heat sink geometry is non-competitive to the straight fins.

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“…Hassan [21] studied the heat transfer inside horizontal and vertical enclosure filled with Cuwater nanofluid where a heat sink with rectangular fins represents the base plate of the enclosure. Xu et al, [22] carried out numerical simulation and experiment to study the heat transfer performance of a symmetrical fractal silicon micro channel subjected to a pulsation flow. The distribution of pressure drop, temperature and the Nusselt number were presented.…”

Section: Introductionmentioning

confidence: 99%

Numerical Optimization of a CPU Heat Sink Geometry

Bangalee

Rahman

Zaimi

et al. 2021

CFDL

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During its operation CPU dissipates undesirable heat. Therefore, heat sink is very essential in modern computing system to absorb extra heat dissipated by the CPU. Forced convection air cooling is common approach. In the present work, a steady-state convective heat transfer process is analyzed for CPU cooling. A rectangular fin heat sink equipped in a computer chassis is numerically investigated and simulated using the software ANSYS CFX. A two-equation based turbulence model is chosen to capture the turbulence of the flow inside the domain. The overall dimension of the heat sink is optimized for three different parameters of the heat sink such as fin quantity, fin height and baseplate thickness. An optimum fin quantity, fin height and baseplate thickness are found, and, respectively. Two different orientations of fins are also compared. Better thermal performance is achieved when the fin channel is perpendicular to the surface parallel to the outlet. The average temperature of the heat sink is found. It is also predicted that the heat sink studied here is capable to keep the CPU temperature underthat is reasonably acceptable.

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Heat transfer performance of a fractal silicon microchannel heat sink subjected to pulsation flow

Cited by 30 publications

References 23 publications

Parametric numerical study of the flow and heat transfer in microchannel with dimples

Parametric numerical study of the flow and heat transfer in microchannel with dimples

Fractal Geometry as an Effective Heat Sink

Numerical Optimization of a CPU Heat Sink Geometry

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